core: convert PID 1 to libsystemd-bus

This patch converts PID 1 to libsystemd-bus and thus drops the
dependency on libdbus. The only remaining code using libdbus is a test
case that validates our bus marshalling against libdbus' marshalling,
and this dependency can be turned off.

This patch also adds a couple of things to libsystem-bus, that are
necessary to make the port work:

- Synthesizing of "Disconnected" messages when bus connections are
  severed.

- Support for attaching multiple vtables for the same interface on the
  same path.

This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus
calls which used an inappropriate signature.

As a side effect we will now generate PropertiesChanged messages which
carry property contents, rather than just invalidation information.

1 files changed, 5 insertions, 3 deletions

diff --git a/src/core/socket.h b/src/core/socket.h
index 3d7eadc9fe..db0796c4a3 100644
--- a/src/core/socket.h
+++ b/src/core/socket.h
@@ -77,12 +77,14 @@ typedef enum SocketResult {
 } SocketResult;
 
 typedef struct SocketPort {
+        Socket *socket;
+
         SocketType type;
         int fd;
 
         SocketAddress address;
         char *path;
-        Watch fd_watch;
+        sd_event_source *event_source;
 
         LIST_FIELDS(struct SocketPort, port);
 } SocketPort;
@@ -111,7 +113,7 @@ struct Socket {
 
         SocketState state, deserialized_state;
 
-        Watch timer_watch;
+        sd_event_source *timer_event_source;
 
         ExecCommand* control_command;
         SocketExecCommand control_command_id;
@@ -144,7 +146,7 @@ struct Socket {
         size_t pipe_size;
         char *bind_to_device;
         char *tcp_congestion;
-        bool reuseport;
+        bool reuse_port;
         long mq_maxmsg;
         long mq_msgsize;